Welcome to Dr. Björn's Auto!
This o-ring seal (90x3) is at the end of the angled drive between differential and driveshafts in a T4 Eurovan Syncro. It is also used between angled drive and transmission case (EFA,DRH).
We have other seals and o-rings as for the T4 transmission as well, call us.
Part Numbers: 099409637